"In the literature on contributors to medical knowledge, attention is most often focused on basic and applied researchers, funders, and regulators. In Clinical Labor, Cooper and Waldby focus on an essential, overlooked, and perhaps exploited population, that of research subjects. The authors are at their strongest in applying a Marxist theoretical perspective to class in medical research and the need to conceptualize participation in clinical trials as labor. . . . Recommended. Graduate students, researchers/faculty, and professionals/practitioners."–M. D. Lagerwey "Choice"